Hello All, As some of you might know form my other thread, I have been driving my I-CDTI mostly in town and like a "petrol driver". I am only getting 33 MPG, which I have been told is very poor and likely the result of my driving style. I read on another thread in this forum about someone resolving a similar problem by "redlining". Questions: Is this advisable to do? Or should I just buy an injector cleaner? What is the correct way to do this? Thanks in advance.